[Serusers] SER+Asterisk Connection

Hi all, I installed the SER and Asterisk on two different boxes on LAN.. I configured the SER and Asterisk in a way thay that the user agents communicate between them. Now, the problem is in the second method , if i use the register command in the Asterisk (sip.conf) , the user registers in the SER and we can view that user in the location table in SER,but at the same time the UA's send busy tone and i gets the messege in the asterisk proxy authentication required. I use this procedure for registeration 1) In the general section of sip.conf register => user[:secret[:authuser]]@host[:port][/extension] 2)sip.conf [mysipprovider-out] type=peer secret=password username=2345 host=sipserver.mysipprovider.com fromuser=2345 fromdomain=fwd.pulver.com nat=yes ;context=from-mysipprovider ; 3)In extensions.conf exten => _9.,1,Dial(SIP/${EXTEN:1}@mysipprovider-out,30,r) Can anybody tell me what i am doing wring with this process... best regards, --------------------------------- Yahoo! Mail goes everywhere you do. Get it on your phone.